The cell is the smallest component in your body. A body consists of organs, the organs consist of cells. Each of us has about 70 trillion of them, that is 70 million million! Every cell, just like the whole human organism, has a metabolism: water, nutrients and oxygen have to get in , metabolism products need to be taken out. For the cells, this transport is handled through openings in their surface, the so-called cell membrane.
These "valves" in the cell membrane open and close as needed. This mechanism is based on voltage potential, i.e., the difference in voltage between the cell interior and the intercellular space. The right or wrong amount of such potential is responsible for healthy or diseased cell metabolism.
Frequency therapy is believed to regulate this voltage potential; this is the underlying theory to explain why frequency therapy is a procedure that can be used to support energetic balance in a variety of ways.
(Above excerpt is taken from the Healy brochure which you can download and read in full from the Healy information pages)